C++ (Cpp) mag_fast_mul_2exp_si 예제들

예제 #1

파일: t-fast_mul_2exp_si.c 프로젝트: fredrik-johansson/arb

int main()
{
    slong iter;
    flint_rand_t state;

    flint_printf("fast_mul_2exp_si....");
    fflush(stdout);

    flint_randinit(state);

    for (iter = 0; iter < 100000 * arb_test_multiplier(); iter++)
    {
        fmpr_t x, y, z;
        mag_t xb, yb;
        slong e;

        fmpr_init(x);
        fmpr_init(y);
        fmpr_init(z);

        mag_init(xb);
        mag_init(yb);

        mag_randtest(xb, state, 15);
        e = n_randint(state, 10000) - n_randint(state, 10000);
        mag_get_fmpr(x, xb);

        mag_fast_mul_2exp_si(yb, xb, e);

        fmpr_mul_2exp_si(y, x, e);

        mag_get_fmpr(z, yb);

        MAG_CHECK_BITS(yb)

        if (!fmpr_equal(z, y))
        {
            flint_printf("FAIL\n\n");
            flint_printf("x = "); fmpr_printd(x, 15); flint_printf("\n\n");
            flint_printf("y = "); fmpr_printd(y, 15); flint_printf("\n\n");
            flint_printf("z = "); fmpr_printd(z, 15); flint_printf("\n\n");
            flint_abort();
        }

        fmpr_clear(x);
        fmpr_clear(y);
        fmpr_clear(z);

        mag_clear(xb);
        mag_clear(yb);
    }

    flint_randclear(state);
    flint_cleanup();
    flint_printf("PASS\n");
    return EXIT_SUCCESS;
}

예제 #2

파일: mul.c 프로젝트: isuruf/arb

static void
_acb_sqr_fast(acb_t z, const acb_t x, slong prec)
{
    int inexact;

    mag_t am, bm, er, fr;

    mag_fast_init_set_arf(am, arb_midref(a));
    mag_fast_init_set_arf(bm, arb_midref(b));

    mag_init(er);
    mag_init(fr);

    mag_fast_addmul(er, am, ar);
    mag_fast_addmul(er, bm, br);
    mag_fast_mul_2exp_si(er, er, 1);
    mag_fast_addmul(er, ar, ar);
    mag_fast_addmul(er, br, br);

    mag_fast_addmul(fr, bm, ar);
    mag_fast_addmul(fr, am, br);
    mag_fast_addmul(fr, ar, br);
    mag_fast_mul_2exp_si(fr, fr, 1);

    inexact = arf_complex_sqr(arb_midref(e), arb_midref(f),
                    arb_midref(a), arb_midref(b), prec, ARB_RND);

    if (inexact & 1)
        arf_mag_add_ulp(arb_radref(e), er, arb_midref(e), prec);
    else
        mag_set(arb_radref(e), er);

    if (inexact & 2)
        arf_mag_add_ulp(arb_radref(f), fr, arb_midref(f), prec);
    else
        mag_set(arb_radref(f), fr);
}